Case is latest involving foreigners that have come despite 2015 nuclear deal with world powers

Iran has handed American academic Xiyue Wang a 10-year prison sentence on spying charges, the news agency for Iran’s judiciary said Sunday, the latest in a string of such cases against foreigners that have raised alarm in the U.S. and Europe.

The news agency, Mizan Online, cited Gholam Hossein Mohseni Ejehi, a spokesman for Iran’s judiciary, as saying that an American had entered the country at the direction of the U.S. and was...